[英]How to add marker on map by double tap and get the coordinates [android]
我想通過雙擊在谷歌地圖上添加標記。 我知道googlemap.OnMapClickListener但它會在單擊時添加一個標記。 我在谷歌地圖中找到了一個關於處理雙擊的帖子,但我無法從另一個類添加標記。
MapFragment.java:
@Override
public View onCreateView(LayoutInflater inflater, final ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_map, container, false);
mMapView = (MapView) view.findViewById(R.id.mapView);
mMapView.onCreate(savedInstanceState);
mMapView.onResume(); // needed to get the map to display immediately
try {
MapsInitializer.initialize(getActivity().getApplicationContext());
} catch (Exception e) {
e.printStackTrace();
}
mMapView.getMapAsync(new OnMapReadyCallback() {
@Override
public void onMapReady(GoogleMap mMap) {
googleMap = mMap;
if (latitude != null && longitude != null) {
// For showing a move to my location button
if (ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED)
{
return;
}
googleMap.setMyLocationEnabled(true);
// For dropping a marker at a point on the Map
final LatLng coordinates = new LatLng(latitude, longitude);
// For zooming automatically to the location of the marker
cameraPosition = new CameraPosition.Builder().target(coordinates).zoom(15).build();
googleMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
googleMap.setOnMapClickListener(new GoogleMap.OnMapClickListener() {
@Override
public void onMapClick(final LatLng coordinates){
**//adds marker on single tap & get coordinates**//
}
});
}
}
});
return view;
}
@Override
public boolean onDoubleTap(MotionEvent e) {
return true;
}
// Here will be some autogenerated methods too
地圖片段.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<azizbekyan.andranik.map.OnDoubleTap
android:id="@+id/mapView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:enabled="true"
android:clickable="true"
android:apiKey="YOUR_API_KEY" />
</LinearLayout>
OnDoubleTap.java:
public class OnDoubleTap extends MapView {
private long lastTouchTime = -1;
public OnDoubleTap(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
if (ev.getAction() == MotionEvent.ACTION_DOWN) {
long thisTime = System.currentTimeMillis();
if (thisTime - lastTouchTime < ViewConfiguration.getDoubleTapTimeout()) {
//** Double tap control here **//
lastTouchTime = -1;
} else {
// Too slow
lastTouchTime = thisTime;
}
}
return super.onInterceptTouchEvent(ev);
}
}
現在如何通過雙擊在谷歌地圖上添加標記並從另一個類獲取坐標? 任何幫助,將不勝感激。
您可以使用googleMap.setonMapClickListener
它
在片段內聲明全局變量
private long lastTouchTime = -1;
將片段內的偵聽器更新為
googleMap.setOnMapClickListener(new GoogleMap.OnMapClickListener() {
@Override
public void onMapClick(final LatLng coordinates){
long thisTime = System.currentTimeMillis();
if (thisTime - lastTouchTime < ViewConfiguration.getDoubleTapTimeout()) {
//** Double tapped , write logic to add Map **//
lastTouchTime = -1;
} else {
lastTouchTime = thisTime;
}
}
});
嘗試實現 rajan ks 答案並將此行添加到您的“onMapReady”方法中
googleMap.getUiSettings().setZoomControlsEnabled(false);
這將禁用 Google 地圖雙擊手勢以放大地圖
為此,您可以使用方法,基於社區維基的這個答案:您需要攔截自定義TouchableWrapper
視圖中的TouchableWrapper
並管理縮放手勢啟用/禁用:
public class TouchableWrapper extends FrameLayout {
private GoogleMap mGoogleMap = null;
private long mLastTouchTime = -1;
public TouchableWrapper(Context context) {
super(context);
}
public void setGoogleMap(GoogleMap googleMap) {
mGoogleMap = googleMap;
}
@Override
public boolean dispatchTouchEvent(MotionEvent event) {
switch (event.getAction() & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_DOWN:
mGoogleMap.getUiSettings().setZoomGesturesEnabled(false);
long thisTime = System.currentTimeMillis();
if (thisTime - mLastTouchTime < ViewConfiguration.getDoubleTapTimeout()) {
if (mGoogleMap != null) {
mGoogleMap.addMarker(new MarkerOptions()
.position(mGoogleMap.getProjection().fromScreenLocation(new Point((int)event.getX(), (int)event.getY())))
.title("DblTapped"));
}
mLastTouchTime = -1;
} else {
mLastTouchTime = thisTime;
mGoogleMap.getUiSettings().setZoomGesturesEnabled(true);
}
break;
}
return super.dispatchTouchEvent(event);
}
}
而不是創建自定義 MapFragment,它交換原始視圖和可觸摸視圖:
public class MultiTouchMapFragment extends MapFragment {
public View mOriginalContentView;
public TouchableWrapper mTouchView;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup parent, Bundle savedInstanceState) {
mOriginalContentView = super.onCreateView(inflater, parent, savedInstanceState);
mTouchView = new TouchableWrapper(getActivity());
mTouchView.addView(mOriginalContentView);
return mTouchView;
}
@Override
public View getView() {
return mOriginalContentView;
}
}
並在MainActivity
使用它:
public class MainActivity extends AppCompatActivity implements OnMapReadyCallback {
private GoogleMap mGoogleMap;
private MultiTouchMapFragment mMapFragment;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mMapFragment = (MultiTouchMapFragment) getFragmentManager()
.findFragmentById(R.id.map_fragment);
mMapFragment.getMapAsync(this);
}
@Override
public void onMapReady(GoogleMap googleMap) {
mGoogleMap = googleMap;
mMapFragment.mTouchView.setGoogleMap(mGoogleMap);
}
}
其中activity_mail.xml
是:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="<your_package_name>.MainActivity">
<fragment
android:id="@+id/map_fragment"
android:name="<your_package_name>.MultiTouchMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</RelativeLayout>
就這樣成功了。
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